Despite their broad occurrence in Australian basins, lower-level taxonomy of Early Cretaceous plesiosaurs is hindered by the scarcity skulls and other diagnostic elements. This paper presents a morphological morphometric analysis vertebrae comparison with selected non-Australian elasmosaurids (basal elasmosaurs, styxosaurines, aristonectines). Biometric involved measurements that include centru...

A new genus and species Allorapisma chuorum gen. sp. nov. is described from the Early Eocene locality at Republic, Washington, U.S.A. The forewing venation of Allorapisma is most similar to that of the genus Principiala Makarkin & Menon from the Early Cretaceous of Brazil and Britain. A new, informal suprageneric taxon consisting of these genera is proposed, the Principiala group. The habitats ...

The paper presents original and published data of radioisotope dating volcanic rocks the Magellan Seamounts. These available geological materials allow us to distinguish five major complexes different ages in guyots Seamounts: 1 — Late Jurassic-Early Cretaceous (earliest Cretaceous); 2 Early (Apt-Albian); 3 (Late Cenomanian-Turonian- Campanian); 4 Campanian-Maastrichian); 5 Cenozoic. Each these...

The causes, rate, and selectivity of the end-Cretaceous mass extinction continue to be highly debated [1-5]. Extinction patterns in small, feathered maniraptoran dinosaurs (including birds) are important for understanding extant biodiversity and present an enigma considering the survival of crown group birds (Neornithes) and the extinction of their close kin across the end-Cretaceous boundary [...

We describe the first beetle mite (Oribatida) found in lower Albian (Lower Cretaceous) amber-bearing site of Ariño, located Teruel Province (eastern Iberian Peninsula). It represents fossil record family Liacaridae (Acariformes: Oribatida: Gustavioidea). A new species, Liacarus (Procorynetes) shtanchaevae Arillo and Subías sp. nov., is described compared with living species subgenus (Procorynet...

The fossil records of Kateretidae from the Mesozoic are significant for understanding origin and early evolution family. recent discoveries Cretaceous kateretids have provided valuable information about palaeodiversity morphological disparity taxa. Here, we establish a new genus species kateretid beetles, Scaporetes rectus gen. et sp. nov., based on specimen preserved in mid-Cretaceous Kachin a...

We present results of the first studies of the bone microstructure of early mammals, based on the Early Jurassic Morganucodon, the Late Cretaceous multituberculates, Kryptobaatar and Nemegtbaatar, and the Late Cretaceous eu− therians Zalambdalestes and Barunlestes. Our results show that the two eutherian taxa grew relatively slowly with pe− riodic pauses in growth indicated by the presence of r...